O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material PTFE Durometer (Hardness) Rating Very Hard Nominal Inside Dia 3 in Nominal Width 1/8 in Actual Inside Dia 2.984 in Actual Width 0.139 in Dash Number 234 Color White Durometer 55 Shore D Nominal Outside Dia 3 1/4 in Actual Outside Dia 3.262 in Temp Range -300 Degrees to 500 Degrees F FDA Approved Yes Package Quantity 5